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The are use cases where the Device Tree appended to the kernel is convinient, so we generate the bundle concatenating the kernel (and potentionally the initramfs) and the Device Tree binaries. To enable it, set KERNEL_DEVICETREE_BUNDLE variable to '1' (From OE-Core rev: f044567326988e84e5d72040e9387c3240836ddb) Signed-off-by: Otavio Salvador <otavio@ossystems.com.br> Signed-off-by: Ross Burton <ross.burton@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
113 lines
4.0 KiB
Plaintext
113 lines
4.0 KiB
Plaintext
# Support for device tree generation
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PACKAGES_append = " \
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kernel-devicetree \
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${@['kernel-image-zimage-bundle', ''][d.getVar('KERNEL_DEVICETREE_BUNDLE') != '1']} \
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"
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FILES_kernel-devicetree = "/${KERNEL_IMAGEDEST}/*.dtb /${KERNEL_IMAGEDEST}/*.dtbo"
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FILES_kernel-image-zimage-bundle = "/${KERNEL_IMAGEDEST}/zImage-*.dtb.bin"
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# Generate kernel+devicetree bundle
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KERNEL_DEVICETREE_BUNDLE ?= "0"
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normalize_dtb () {
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DTB="$1"
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if echo ${DTB} | grep -q '/dts/'; then
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bbwarn "${DTB} contains the full path to the the dts file, but only the dtb name should be used."
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DTB=`basename ${DTB} | sed 's,\.dts$,.dtb,g'`
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fi
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echo "${DTB}"
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}
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get_real_dtb_path_in_kernel () {
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DTB="$1"
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DTB_PATH="${B}/arch/${ARCH}/boot/dts/${DTB}"
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if [ ! -e "${DTB_PATH}" ]; then
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DTB_PATH="${B}/arch/${ARCH}/boot/${DTB}"
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fi
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echo "${DTB_PATH}"
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}
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do_configure_append() {
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if [ "${KERNEL_DEVICETREE_BUNDLE}" = "1" ]; then
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if echo ${KERNEL_IMAGETYPE_FOR_MAKE} | grep -q 'zImage'; then
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case "${ARCH}" in
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"arm")
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config="${B}/.config"
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if ! grep -q 'CONFIG_ARM_APPENDED_DTB=y' $config; then
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bbwarn 'CONFIG_ARM_APPENDED_DTB is NOT enabled in the kernel. Enabling it to allow the kernel to boot with the Device Tree appended!'
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sed -i "/CONFIG_ARM_APPENDED_DTB[ =]/d" $config
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echo "CONFIG_ARM_APPENDED_DTB=y" >> $config
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echo "# CONFIG_ARM_ATAG_DTB_COMPAT is not set" >> $config
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fi
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;;
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*)
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bberror "KERNEL_DEVICETREE_BUNDLE is not supported for ${ARCH}. Currently it is only supported for 'ARM'."
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esac
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else
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bberror 'The KERNEL_DEVICETREE_BUNDLE requires the KERNEL_IMAGETYPE to contain zImage.'
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fi
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fi
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}
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do_compile_append() {
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for DTB in ${KERNEL_DEVICETREE}; do
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DTB=`normalize_dtb "${DTB}"`
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oe_runmake ${DTB}
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done
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}
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do_install_append() {
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for DTB in ${KERNEL_DEVICETREE}; do
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DTB=`normalize_dtb "${DTB}"`
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DTB_EXT=${DTB##*.}
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DTB_PATH=`get_real_dtb_path_in_kernel "${DTB}"`
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DTB_BASE_NAME=`basename ${DTB} ."${DTB_EXT}"`
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install -m 0644 ${DTB_PATH} ${D}/${KERNEL_IMAGEDEST}/${DTB_BASE_NAME}.${DTB_EXT}
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for type in ${KERNEL_IMAGETYPE_FOR_MAKE}; do
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symlink_name=${type}"-"${KERNEL_IMAGE_SYMLINK_NAME}
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DTB_SYMLINK_NAME=`echo ${symlink_name} | sed "s/${MACHINE}/${DTB_BASE_NAME}/g"`
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ln -sf ${DTB_BASE_NAME}.${DTB_EXT} ${D}/${KERNEL_IMAGEDEST}/devicetree-${DTB_SYMLINK_NAME}.${DTB_EXT}
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if [ "$type" = "zImage" ] && [ "${KERNEL_DEVICETREE_BUNDLE}" = "1" ]; then
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cat ${D}/${KERNEL_IMAGEDEST}/$type \
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${D}/${KERNEL_IMAGEDEST}/${DTB_BASE_NAME}.${DTB_EXT} \
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> ${D}/${KERNEL_IMAGEDEST}/$type-${DTB_BASE_NAME}.${DTB_EXT}.bin
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fi
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done
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done
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}
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do_deploy_append() {
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for DTB in ${KERNEL_DEVICETREE}; do
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DTB=`normalize_dtb "${DTB}"`
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DTB_EXT=${DTB##*.}
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DTB_BASE_NAME=`basename ${DTB} ."${DTB_EXT}"`
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for type in ${KERNEL_IMAGETYPE_FOR_MAKE}; do
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base_name=${type}"-"${KERNEL_IMAGE_BASE_NAME}
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symlink_name=${type}"-"${KERNEL_IMAGE_SYMLINK_NAME}
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DTB_NAME=`echo ${base_name} | sed "s/${MACHINE}/${DTB_BASE_NAME}/g"`
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DTB_SYMLINK_NAME=`echo ${symlink_name} | sed "s/${MACHINE}/${DTB_BASE_NAME}/g"`
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DTB_PATH=`get_real_dtb_path_in_kernel "${DTB}"`
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install -d ${DEPLOYDIR}
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install -m 0644 ${DTB_PATH} ${DEPLOYDIR}/${DTB_NAME}.${DTB_EXT}
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ln -sf ${DTB_NAME}.${DTB_EXT} ${DEPLOYDIR}/${DTB_SYMLINK_NAME}.${DTB_EXT}
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ln -sf ${DTB_NAME}.${DTB_EXT} ${DEPLOYDIR}/${DTB_BASE_NAME}.${DTB_EXT}
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if [ "$type" = "zImage" ] && [ "${KERNEL_DEVICETREE_BUNDLE}" = "1" ]; then
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cat ${DEPLOYDIR}/$type \
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${DEPLOYDIR}/${DTB_NAME}.${DTB_EXT} \
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> ${DEPLOYDIR}/${DTB_NAME}.${DTB_EXT}.bin
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ln -sf ${DTB_NAME}.${DTB_EXT}.bin ${DEPLOYDIR}/$type-${DTB_BASE_NAME}.${DTB_EXT}.bin
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if [ -e "${KERNEL_OUTPUT_DIR}/${type}.initramfs" ]; then
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cat ${KERNEL_OUTPUT_DIR}/${type}.initramfs \
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${DEPLOYDIR}/${DTB_NAME}.${DTB_EXT} \
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> ${DEPLOYDIR}/${type}-${INITRAMFS_BASE_NAME}-${DTB_BASE_NAME}.${DTB_EXT}.bin
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ln -sf ${type}-${INITRAMFS_BASE_NAME}-${DTB_BASE_NAME}.${DTB_EXT}.bin \
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${DEPLOYDIR}/${type}-initramfs-${DTB_BASE_NAME}.${DTB_EXT}-${MACHINE}.bin
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fi
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fi
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done
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done
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}
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